I like Animal Plastics. I like their cage design and manufacturing the best. You can get a basking shelf, lights, heat tape, cage dividers, stands, cage wheels, and locks from them directly, and if you buy a radiant heat panel from say reptile basics or pro products and have them ship the panel to AP they will instal the heat panel and cut holes for the cord.
Here is a thread I wrote on their cages: http://ball-pythons.net/forums/showt...With-Pictures!